Labels:text | screenshot | font OCR: Incidence: 1:10,000 Mechanism and substrate: Build up of phenylalanine in plasma Clinical features Development: normal at birth; moderate to severe mental retardation if untreated Neurologic: seizures, hyperactivity, extreme irritability Skin: dry eczematous rash Eyes: no findings Treatment: Dietary restriction of phenylalanine through low-protein diet and special formula ..